TM 928 break-in ended but problem  
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All Forums >> RC Cars, Buggies, Trucks, Tanks and more >> RC Car Engines >> Car Nitro & Gas Engines >> TM 928 break-in ended but problem
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TM 928 break-in ended but problem - 6/25/2008 4:52:40 AM   
dakamat


 

Posts: 141
Joined: 3/23/2004
From: Dolbeau, QC, CANADA
Status: offline 		I've ending the break-in of my TM928 today, but when i wide open trottle sometime the engine died. It seam to be well tune, the temperature is in the 240-260 range (lower thatn that and the fuel spiting by the tune pipe and he run like a four stroke).
And sometime, it make a big backfire. I've shim it with an aditional head shim like they said in the manual to run 30% nitro, but not seam to solve probleme, so i've remove the shim.

This engine arrive with an rb #7 glow plug (cold one) but i've remove it and change it for a #6 (medium) (right before to start the break-in.)
I've try the stock #7.

Did you think that this could be my problem?

Thank you

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Ofna Hyper 7 pro, Hyper .21, 8 ports, Thunder Tiger Ducati nitro bike, Team Iwata R/C body painting
       Post #: 1

RE: TM 928 break-in ended but problem - 9/2/2008 7:12:06 AM   
paperchaser


 

Posts: 1
Joined: 6/9/2008
From: Durham, NC, USA
Status: offline 		i'm having the same problem with my tm928 and i still cant figure out what the problem is. i've taken it apart,cleaned it, replaced the #7 with a # 5 and the top end still dies out and i'm having a hard time with the idiing. any help from anybody would be appreciated.
.

(in reply to dakamat)
       Post #: 2

RE: TM 928 break-in ended but problem - 9/2/2008 8:35:46 AM   
Foxy



Posts: 8861
Joined: 3/23/2005
From: Kingston UK, but living in Athens, GREECE
Status: offline 		lol, this is why I gave up nitro. This exact problem with this exact engine, after 20 years, was the end for me. After so many engine break ins and so many tuning sessions, I reached the end of my tether with nitro and went to gas.

Basically, this is normal behaviour for this engine. It takes about 4 liters before it's fully broken in and runs reliably. When it does though, it's a total monster. Just be patient. By the way, to the OP, put the shim back in, it is necessary if you are running 30%. Consider using 20% though for break in (and leaving the shim out) as it will be easier to tune.

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Foxy. RCU Car Forums Moderator.
"Artificial Intelligence is no match for genuine stupidity".
Check out my Large Scale Gas RC Car Vids... www.youtube.com/foxy4242

(in reply to paperchaser)
       Post #: 3

RE: TM 928 break-in ended but problem - 9/2/2008 4:24:21 PM   
mogi


 

Posts: 240
Joined: 1/21/2007
From: hullhull, UNITED KINGDOM
Status: offline 		rb 928 motors are a nightmare to tune,run fine one day and the next they are all over the place.a friend has one gathering dust as we speak.

(in reply to Foxy)
       Post #: 4

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All Forums >> RC Cars, Buggies, Trucks, Tanks and more >> RC Car Engines >> Car Nitro & Gas Engines >> TM 928 break-in ended but problem
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